Identification, transcriptional and functional analysis of heat-shock protein 90s in banana (Musa acuminata L.) highlight their novel role in melatonin-mediated plant response to Fusarium wilt

文献类型： 外文期刊

第一作者： Wei, Yunxie

作者： Wei, Yunxie;Wang, Qiannan;Zeng, Hongqiu;Li, Xiaolin;Yan, Yu;He, Chaozu;Shi, Haitao;Hu, Wei;Reiter, Russel J.

作者机构：

关键词： 90-kDa heat-shock protein;banana (Musa acuminata);expression profile;fungal pathogen Fusarium oxysporum f.sp.cubense;melatonin

期刊名称：JOURNAL OF PINEAL RESEARCH （ 影响因子：13.007； 五年影响因子：12.936 ）

ISSN： 0742-3098

年卷期： 2017 年 62 卷 1 期

页码：

收录情况： SCI

摘要： As one popular fresh fruit, banana (Musa acuminata) is cultivated in the world's subtropical and tropical areas. In recent years, pathogen Fusarium oxysporum f. sp. cubense (Foc) has been widely and rapidly spread to banana cultivated areas, causing substantial yield loss. However, the molecular mechanism of banana response to Foc remains unclear, and functional identification of disease-related genes is also very limited. In this study, nine 90 kDa heat-shock proteins (HSP90s) were genomewide identified. Moreover, the expression profile of them in different organs, developmental stages, and in response to abiotic and fungal pathogen Foc were systematically analyzed. Notably, we found that the transcripts of 9 MaHSP90s were commonly regulated by melatonin (N-acetyl-5-methoxytryptamine) and Foc infection. Further studies showed that exogenous application of melatonin improved banana resistance to Fusarium wilt, but the effect was lost when cotreated with HSP90 inhibitor (geldanamycin, GDA). Moreover, melatonin and GDA had opposite effect on auxin level in response to Foc4, while melatonin and GDA cotreated plants had no significant effect, suggesting the involvement of MaHSP90s in the cross talk of melatonin and auxin in response to fungal infection. Taken together, this study demonstrated that MaHSP90s are essential for melatonin-mediated plant response to Fusarium wilt, which extends our understanding the putative roles of MaHSP90s as well as melatonin in the biological control of banana Fusarium wilt.

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